摘要
主要对移动通信领域下一代移动通信技术(即所谓的4 G)进行了论述.4 G通信系统将为移动中的用户提供100 MBit/s的数据传输,而为静止的用户提供1 Gb/s的数据传输.因此,需要更先进的技术来支持这样一个无线网络.展望了4 G中可能出现的新技术,对物理层结构做了初步探讨.灵活高效的频谱、蜂窝间干扰的有效解决是未来4 G的技术亮点.
This article identifies and describes the requirements and challenges of next-generation mobile communications systems. The so-called ＂fourth generation＂ （4 G） aims at throughput rates of more than 100 MBit/s outdoors with high mobility and 1 GBit/s indoors, which requires new advanced techniques in the air interface of such a system. Its new possible techniques are outlined, the concept of its future basic physical layer is introduced and its adaptability to the channel of all the modules in such a possible concept is highlighted. Since the needed large bandwidth for high data rates is a very valuable resource, future communications systems need high spectrum flexibility. Furthermore, 4 G systems will face severe inter-cell interference that has to be tackled; thus both challenges, i.e. , spectrum flexibility and inter-cell interference, are discussed here in detail.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2009年第4期187-191,共5页
Journal of Central South University of Forestry & Technology
基金
中南大学博士研究生学位论文创新选题项目(1343-77208)
